Mark Twain was one of the authors of what novel

The segments shown below could form a triangle.

What is the name of the social stratification set up by the vedic peoples of the indus river valley civilization

Which stanza structure does emily dickinson use in this excerpt from "hope is the thing with feathers"? hope is the thing with feathers that perches in the soul, and sings the tune without the words, and never stops at all, and sweetest in the gale is heard, and sore must be the storm that could abash the little bird that kept so many warm.